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Since 2002, iHerb.com has been my only source of healthy products such as vitamins & herbal supplements, gluten-free foods and chemical-free body-care products.
Orders are always processed quickly, and shipping rates with Sagawa Mail are very reasonable for Japanese customers.
The Customer Service department is excellent. All claims are handled quickly and to your satisfaction.
On this page, you can see some of My Favorite Products.

There is no excuse for putting a known health hazard (red dye #40) in an otherwise healthy product. Who needs a pink tint in a tablet anyway? I have always been suspicious of this company and this confirms that they aren't really concerned about health. Luckily this was offered as a free sample, as it went straight to the garbage.

After using serrapeptase for the past few months (always avoiding food), I am about 98% free of the nagging lower back pain and stiffness which I've had for several years. I have seen the results, and at age 55 I plan to continue taking systemic enzymes. My next order will be for the Source Naturals enzyme blend, RejuvenZyme.

I've tried several brands and this is by far the worst at iherb. It is a bit cheaper than others, but that is because it is damp! So you're just paying for added moisture. No savings there. Also, the zipper on the bag doesn't work! Basically Xylitol is Xylitol, so I will not buy this brand again. I prefer one which is free-flowing not soggy.

This stuff is amazing! I'm in my late 50 and had been suffering for several years with chronic lower back pain and stiffness. After a couple months on this enzyme, the pain was gone and has not come back. I take it now as part of my health maintenance program because I know it's actually working. Only one a day is also a convenience.

My wife and I went from sleeping 8+ hours (waking up at least once during the night) to usually sleeping straight through 6 to 7 hours. We now wake up feeling well-rested with less sleep. It worked from the first time we took it.

Haven't been taking it very long, but it seems to be helping with my morning back pain.
UPDATE: This product eliminated my lower back stiffness and pain by the end of the bottle. That pain had been troubling me for about five years.
UPDATE: Two years later and still no sign of pain. I'm 59 and as flexible now as I've ever been. I continue taking it on a daily basis to be sure I stay that way.